Question

Konichuwa!!! Please help me on this question!

What are the exact solutions of x2 − x − 4 = 0?

x = the quantity of negative 1 plus or minus the square root of 15 all over 2

x = the quantity of 1 plus or minus the square root of 15 all over 2

x = the quantity of 1 plus or minus the square root of 17 all over 2

x = the quantity of negative 1 plus or minus the square root of 17 all over 2

Answer 1

C) x = (1 ± √17)/2

Explanation:

x² - x - 4 = 0

Quadratic equation: x = (-b ± (b² - 4ac))/a, where a has x², b has x, and c is only constant

Plug in: x = (1 ± √(1 - 4*1*-4))/2

Multiply: x = (1 ± √(1 + 16))/2

Add: x = (1 ± √17)/2